m/potassium/calcium) siowiy enters the cell. This causes the membrane potential to reach (-40/-60/+20) and at that point (HCN/VGNA/ VGCA/ VGK) channels open up and membrane to (sodium/potassium/calcium) rushes in further depolarizing the (-40/-60/+20). At this point the (HCN/VGNA/ _(HCN/VGNA/ VGCA/ VGK) channels open (sodium/potassium/calcium) to move (in/out) of the cells. This brings the VGCA/ VGK) channels close and the causing membrane potential back (-40/-60/+20).
m/potassium/calcium) siowiy enters the cell. This causes the membrane potential to reach (-40/-60/+20) and at that point (HCN/VGNA/ VGCA/ VGK) channels open up and membrane to (sodium/potassium/calcium) rushes in further depolarizing the (-40/-60/+20). At this point the (HCN/VGNA/ _(HCN/VGNA/ VGCA/ VGK) channels open (sodium/potassium/calcium) to move (in/out) of the cells. This brings the VGCA/ VGK) channels close and the causing membrane potential back (-40/-60/+20).
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:At -60mV, __________________ channels (HCN/VGNa/VGCa/VGK) open and ________________ (sodium/potassium/calcium) slowly enters the cell. This causes the membrane potential to reach ________ (-40/-60/+20) and at that point __________________ (HCN/VGNa/VGCa/VGK) channels open up and ______________ (sodium/potassium/calcium) rushes in further depolarizing the membrane to _______________ (-40/-60/+20). At this point the _________________________ (HCN/VGNa/VGCa/VGK) channels close and the ___________________________ (HCN/VGNa/VGCa/VGK) channels open causing _______________ (sodium/potassium/calcium) to move (in/out) of the cells. This brings the membrane potential back _____________ (-40/-60/+20).
Expert Solution
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The typical resting membrane potential of a cell which is negative, arises from the separation of potassium ions from intracellular, relatively immobile anions across the membrane of the cell and by the operation of Sodium Potassium pump.
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